CFRN Flight and Transport 5

Question 1

When calculating oxygen supply for a ventilated patient being transported on a fixed-wing aircraft, the formula for E-cylinder duration is:

Accepted Answer

(Gauge PSI × 0.28) / flow rate = minutes

Answer

For an E-cylinder, the constant is 0.28; multiply gauge PSI by 0.28 and divide by flow rate in L/min to get minutes of supply remaining.

Question 2

A patient is being transported via helicopter following a diving accident with suspected decompression sickness. The flight nurse should request the pilot fly at:

Accepted Answer

The lowest safe altitude, ideally below 1,000 feet AGL

Answer

Flying at the lowest safe altitude minimizes further nitrogen bubble expansion per Boyle's Law, reducing the risk of worsening decompression sickness.

Question 3

During air medical transport, the primary cause of spatial disorientation in flight crew is:

Accepted Answer

Conflicting signals between the vestibular system and visual system

Answer

Spatial disorientation results from the vestibular system's misleading proprioceptive signals conflicting with visual references, particularly in IMC conditions.

Question 4

A patient receiving a heparin infusion during air transport develops signs of heparin-induced thrombocytopenia (HIT). The flight nurse's priority action is:

Accepted Answer

Discontinue the heparin infusion and notify receiving facility

Answer

Heparin must be immediately discontinued if HIT is suspected; continuing it risks life-threatening thrombosis, and protamine is not indicated for HIT.

Question 5

Night vision goggles (NVGs) used in air medical operations amplify which part of the electromagnetic spectrum?

Accepted Answer

Near-infrared light (700–900 nm)

Answer

NVGs amplify near-infrared light (700–900 nm) that is invisible to the naked eye, enabling low-light navigation without overt white light sources.

CFRN - Certified Flight Registered Nurse Practice Test

CFRN - Certified Flight Registered Nurse Practice Test

CFRN Flight and Transport 5